<template>
  <div class="lookForMonth_wrapper">
    <div class="calendar" :style="calendarStyle">
      <div
        v-for="(item, index) in calendarData"
        class="calendar_item"
        :key="index"
        :class="{
          ash: item.color === 'ash',
          date: index > 6 && item.color !== 'ash',
          bor: date === item.label && atMonth === isAtMonthData,
        }"
      >
        <p class="dateEdit">
          {{ item.label }}
          <span v-if="index > 6">日</span>
          <i
            class="el-icon-edit-outline"
            v-if="item.color !== 'ash' && index >= 7"
          ></i>
        </p>
        <p v-if="date === item.label && atMonth === isAtMonthData">
          <span>O</span>
        </p>
      </div>
    </div>
        <div class="lookForMonth_bottom">
      <div class="selectDate">
        <div>{{ year }} 年 {{ month }} 月</div>
        <div class="upDownSelect">
          <div class="upDownSelect_item" @click="dateUp"></div>
          <div class="upDownSelect_item" @click="dateDown"></div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
export default {
  name: "lookForMonth",
  data: () => {
    return {
      calendarData: [], //日历循环渲染数据
      year: 0, //当前日期年
      month: 0, //当前日期月数
      date: 0, //当前日期号数
      day: 0, //当前星期几
    };
  },
  directives: {},
  filters: {},
  computed: {
    // 根据当月日期详情更改日历表格高度
    calendarStyle() {
      if (this.calendarData.length > 42) {
        return "height: 701px;";
      } else {
        return "height: 601px;";
      }
    },
  },
  async created() {
    // 获取当前日期数据
    this.getNow();
    this.getCalendarDate();
    // 给calendarData添加当月数据
  },

  props: ["range", "type"],

  mounted() {},
  methods: {
    // 获取当前时间
    getNow() {
      let now = new Date();
      this.year = +now.getFullYear();
      this.month = +now.getMonth() + 1;
      this.date = +now.getDate();
      this.day = +now.getDay();
      this.atMonth = this.year + "-" + this.month;
    },

    // 获取每个月的天数
    monthDay(month) {
      if ([1, 3, 5, 7, 8, 10, 12].includes(month)) {
        return 31;
      } else if ([4, 6, 9, 11].includes(month)) {
        return 30;
      } else if (month === 2) {
        //  判断当年是否为闰年
        if (
          (this.year % 4 === 0 && this.year % 100 !== 0) ||
          this.year % 400 === 0
        ) {
          return 29;
        } else {
          return 28;
        }
      }
    },
    // 给calendarData添加当月数据
    getCalendarDate() {
      // 获取当前月份一号星期几
      let firstDay = new Date(
        this.year + "-" + this.month + "-" + "01"
      ).getDay();
      // 判断具体年月
      this.isAtMonthData = this.year + "-" + this.month;
      // 1234567 or 7123456
      let typeTemp = this.type == 1 ? 1 : 0;
      this.calendarData =
        typeTemp != 1
          ? [
              { label: "日" },
              { label: "一" },
              { label: "二" },
              { label: "三" },
              { label: "四" },
              { label: "五" },
              { label: "六" },
            ]
          : [
              { label: "一" },
              { label: "二" },
              { label: "三" },
              { label: "四" },
              { label: "五" },
              { label: "六" },
              { label: "日" },
            ];
      let num = parseInt(firstDay);
      let nowDays = this.monthDay(this.month);
      let lastMonth = this.month - 1 > 0 ? this.month - 1 : 12;
      let lastDays = this.monthDay(lastMonth);

      // 循环添加上一个月数据
      for (let i = 0; i < num; i++) {
        this.calendarData.push({ label: lastDays - num + i + 1, color: "ash" });
      }

      // 循环添加当月数据
      for (let i = typeTemp; i < nowDays; i++) {
        this.calendarData.push({ label: i + 1, month: this.month });
      }

      // 循环添加下一个月数据
      if (this.calendarData.length % 7 !== 0) {
        let surplusDay = 7 - (this.calendarData.length % 7);
        for (let i = 0; i < surplusDay; i++) {
          this.calendarData.push({ label: i + 1, color: "ash" });
        }
      }
      // 判断日期
      console.log(this.calendarData);
    },

    // 将日期调上
    dateUp() {
      this.month--;
      if (this.month <= 0) {
        this.year--;
        this.month = 12;
      }
      this.getCalendarDate(); // 给calendarData添加当月数据
    },
    // 将日期调下
    dateDown() {
      this.month++;
      if (this.month > 12) {
        this.year++;
        this.month = 1;
      }
      this.getCalendarDate(); // 给calendarData添加当月数据
    },

    // 判断数据类型
    propType(target) {
      var typeOfStr = typeof target;
      var template = {
        "[object Array]": "array",
        "[object Object]": "object",
        "[object Number]": "number-object",
        "[object String]": "string-object",
        "[object Boolean]": "boolean-object",
        "[object Date]": "date-object",
        "[object RegExp]": "regExp-object",
      };
      if (target === null) {
        return "null";
      }
      if (typeOfStr == "object") {
        var str = Object.prototype.toString.call(target);
        return template[str];
      } else {
        return typeOfStr;
      }
    },
  },
};
</script>
<style lang="less" scoped>
.lookForMonth_wrapper {
  padding: 20px;
  width: 701px;
  margin: auto;
}
.lookForMonth_bottom {
  margin-top: 20px;
  overflow: hidden;
  .selectTeacher {
    float: left;
  }
  .selectDate {
    height: 30px;
    line-height: 30px;
    float: right;
    display: flex;
    .upDownSelect {
      display: flex;
      flex-direction: column;
      margin-top: -2px;
      margin-left: 5px;
      .upDownSelect_item {
        width: 0;
        height: 0;
        border: 7px solid transparent;
        cursor: pointer;
      }
      .upDownSelect_item:nth-child(1) {
        border-bottom: 7px solid #666;
        margin-bottom: 5px;
        &:hover {
          border-bottom: 7px solid skyblue;
        }
      }
      .upDownSelect_item:nth-child(2) {
        border-top: 7px solid #666;
        &:hover {
          border-top: 7px solid skyblue;
        }
      }
    }
  }
}
/* 日历表样式=======================================↓ */
.calendar {
  width: 701px;
  border-top: 1px solid #ccc;
  border-left: 1px solid #ccc;
  display: flex;
  flex-wrap: wrap;
  box-sizing: border-box;
  .calendar_item {
    box-sizing: border-box;
    width: 100px;
    height: auto;
    border-right: 1px solid #ccc;
    border-bottom: 1px solid #ccc;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    &.date:hover {
      background: #eee;
    }
    .status {
      margin-top: 10px;
      &.textBlue {
        color: blue;
      }
      &.textRed {
        color: brown;
      }
    }
    .el-icon-edit-outline {
      cursor: pointer;
      margin-left: 7px;
    }
  }
  .ash {
    color: gainsboro;
  }
  .dateEdit {
    margin-bottom: 10px;
  }
  .bor {
    border: 1px solid red;
  }
}
</style>
